On December 28, the Internal Revenue Service (IRS) issued proposed regulations that that provide guidance on “large employers'” shared responsibility for employee health insurance coverage under Internal Revenue Code section 4980H. The proposed regulations provide definitions and rules for determining status as an applicable large employer and applicable large employer member, for determining full-time employees, for determining assessable payments under section 4980H(a), for determining whether an employer is subject to assessable payments under section 4980H(b), and for administering and assessing payments under section 4980H.